What does it mean when you have the same dream over again and you reamber why you scared in your dream but when you waqke up you scared ut yo don't know why?

Remembering only the emotions of a dream without remembering the dream itself usually means that the dream is not particularly important - it is the emotion that needs to be considered and managed in real life. In this question, being scared is the important thing. The dreamer might consider what is scary right now in real life, and how best to deal with that scary situation.